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The lifecycle of stars, from their birth in nebulae to their ultimate fate as white dwarfs, neutron stars, or black holes, shapes the cosmos. These celestial bodies forge elements through nuclear fusion, with supernovae creating heavy elements and dispersing them across space. This stardust contributes to new stars and planets, underlining our connection to the universe's vast chemical evolution and the cycle of stellar existence.
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Stars fuse hydrogen into helium in their cores, releasing energy and creating the elements that make up our bodies and the world around us
When massive stars explode in supernovae, they produce elements heavier than iron, which are then scattered throughout the cosmos and contribute to the formation of new stars and planets
The phrase "we are all made of stardust" is a literal truth, reflecting our shared cosmic heritage as the elements in our bodies were formed in the depths of space
Stars are born from the gravitational collapse of gas and dust within nebulae, and their life cycles are determined by their initial mass
The main sequence is the primary phase of a star's life, where it fuses hydrogen into helium in its core and remains in a stable state of equilibrium
After exhausting their hydrogen fuel, stars may expand into red giants and eventually become white dwarfs or undergo a supernova explosion, depending on their mass
White dwarfs are the remnants of medium-sized stars that slowly cool and fade over time, but may also explode as a Type Ia supernova if their mass increases beyond a certain limit
Neutron stars are incredibly dense remnants of more massive stars, consisting mostly of neutrons and having strong magnetic fields
The most massive stars collapse under their own gravity to form black holes, regions of space where gravity is so strong that nothing, not even light, can escape